window.onload = function (){
    //获取显示隐藏按钮dom数组
    let showBtnArr = document.getElementsByClassName('fa-caret-down');
    //获取订单明细dom数组
    let detailedBoxArr = document.getElementsByClassName('order-detailed')
    //设置所有订单明细都隐藏
    for(let i=0;i<detailedBoxArr.length;i++){
        detailedBoxArr[i].style.display='none';
    }
    for(let i=0;i<showBtnArr.length;i++){
        showBtnArr[i].onclick = function (){
            if(detailedBoxArr[i].style.display == 'none'){
                detailedBoxArr[i].style.display='block';
            }
            else{
                detailedBoxArr[i].style.display='none';
            }
        }
    }
}